Sync: Remove pthreads from event_sys code. Remove asynch version of GaiaAuthe...

chrome/browser/sync/engine/client_command_channel.h

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SYNC_ENGINE_CLIENT_COMMAND_CHANNEL_H_
 #define CHROME_BROWSER_SYNC_ENGINE_CLIENT_COMMAND_CHANNEL_H_
 
 #include "chrome/browser/sync/protocol/sync.pb.h"
 #include "chrome/browser/sync/util/event_sys.h"
 
 namespace browser_sync {
 
 // Commands for the client come back in sync responses, which is kind of
 // inconvenient because some services (like the bandwidth throttler) want to
 // know about them. So to avoid explicit dependencies on this protocol
 // behavior, the syncer dumps all client commands onto a shared client command
 // channel.
 
 struct ClientCommandChannelTraits {
   typedef const sync_pb::ClientCommand* EventType;
   static inline bool IsChannelShutdownEvent(const EventType &event) {
     return 0 == event;
   }
 };
 
-typedef EventChannel<ClientCommandChannelTraits, PThreadMutex>
+typedef EventChannel<ClientCommandChannelTraits, Lock>
     ClientCommandChannel;
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_CLIENT_COMMAND_CHANNEL_H_